[Presentation API, Android] Implement closing the route

chrome/browser/media/android/router/media_router_android.cc

Index: chrome/browser/media/android/router/media_router_android.cc
diff --git a/chrome/browser/media/android/router/media_router_android.cc b/chrome/browser/media/android/router/media_router_android.cc
index f47e3f1c1b38380f94294e3243b8699741c4be7a..218cec24451098e392533e2099622c152d43e0cf 100644
--- a/chrome/browser/media/android/router/media_router_android.cc
+++ b/chrome/browser/media/android/router/media_router_android.cc
@@ -98,7 +98,11 @@ void MediaRouterAndroid::JoinRoute(
 }
 
 void MediaRouterAndroid::CloseRoute(const MediaRoute::Id& route_id) {
-  NOTIMPLEMENTED();
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jroute_id =
+          base::android::ConvertUTF8ToJavaString(env, route_id);
+  Java_ChromeMediaRouter_closeRoute(
+      env, java_media_router_.obj(), jroute_id.obj());
 }
 
 void MediaRouterAndroid::SendRouteMessage(